Big Ideas Math Algebra 1 A Bridge to Success
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Big Ideas Math Algebra 1 A Bridge to Success View details
1. Graphing f(x) = ax^37
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Exercise 24 Page 424

The x-intercept is the x-coordinate of the point where y=0.

Yes, see solution.

Practice makes perfect
Recall that the x-intercept is the x-coordinate of the point where y=0. Since we are considering the expression y=ax^2, the x-intercept will be the value satisfying the equation shown below.

0=ax^2 Remember that a cannot be zero, otherwise we would have a constant zero function instead of a quadratic one. Therefore, the above equation is only satisfied when x=0. Another way to interpret this result is that the graph of any function of the form y=ax^2 passes through the origin.